Interaction Between Pannexin 1 and Caveolin-1 in Smooth Muscle Can Regulate Blood Pressure

Leon J. DeLalio, Alexander S. Keller, Jiwang Chen, Andrew K.J. Boyce, Mykhaylo V. Artamonov, Henry R. Askew-Page, T. C.Stevenson Keller, Scott R. Johnstone, Rachel B. Weaver, Miranda E. Good, Sara A. Murphy, Angela K. Best, Ellen L. Mintz, Silvia Penuela, Iain A. Greenwood, Roberto Machado, Avril V. Somlyo, Leigh Anne Swayne, Richard D. Minshall, Brant E. Isakson

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Objective- Sympathetic nerve innervation of vascular smooth muscle cells (VSMCs) is a major regulator of arteriolar vasoconstriction, vascular resistance, and blood pressure. Importantly, α-adrenergic receptor stimulation, which uniquely couples with Panx1 (pannexin 1) channel-mediated ATP release in resistance arteries, also requires localization to membrane caveolae. Here, we test whether localization of Panx1 to Cav1 (caveolin-1) promotes channel function (stimulus-dependent ATP release and adrenergic vasoconstriction) and is important for blood pressure homeostasis. Approach and Results- We use in vitro VSMC culture models, ex vivo resistance arteries, and a novel inducible VSMC-specific Cav1 knockout mouse to probe interactions between Panx1 and Cav1. We report that Panx1 and Cav1 colocalized on the VSMC plasma membrane of resistance arteries near sympathetic nerves in an adrenergic stimulus-dependent manner. Genetic deletion of Cav1 significantly blunts adrenergic-stimulated ATP release and vasoconstriction, with no direct influence on endothelium-dependent vasodilation or cardiac function. A significant reduction in mean arterial pressure (total=4 mm Hg; night=7 mm Hg) occurred in mice deficient for VSMC Cav1. These animals were resistant to further blood pressure lowering using a Panx1 peptide inhibitor Px1IL2P, which targets an intracellular loop region necessary for channel function. Conclusions- Translocalization of Panx1 to Cav1-enriched caveolae in VSMCs augments the release of purinergic stimuli necessary for proper adrenergic-mediated vasoconstriction and blood pressure homeostasis.

Original languageEnglish (US)
Pages (from-to)2065-2078
Number of pages14
JournalArteriosclerosis, Thrombosis, and Vascular Biology
Volume38
Issue number9
DOIs
StatePublished - Sep 1 2018

Fingerprint

Caveolin 1
Smooth Muscle
Vascular Smooth Muscle
Smooth Muscle Myocytes
Blood Pressure
Vasoconstriction
Adrenergic Agents
Caveolae
Arteries
Adenosine Triphosphate
Homeostasis
Caveolin 3
Cell Membrane
Knockout Mice
Vasodilation
Vascular Resistance
Adrenergic Receptors
Endothelium
Arterial Pressure
Cell Culture Techniques

Keywords

  • adrenergic agents
  • blood pressure
  • caveolae
  • muscle, smooth
  • Pannexin 1

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

DeLalio, L. J., Keller, A. S., Chen, J., Boyce, A. K. J., Artamonov, M. V., Askew-Page, H. R., ... Isakson, B. E. (2018). Interaction Between Pannexin 1 and Caveolin-1 in Smooth Muscle Can Regulate Blood Pressure. Arteriosclerosis, Thrombosis, and Vascular Biology, 38(9), 2065-2078. https://doi.org/10.1161/ATVBAHA.118.311290

Interaction Between Pannexin 1 and Caveolin-1 in Smooth Muscle Can Regulate Blood Pressure. / DeLalio, Leon J.; Keller, Alexander S.; Chen, Jiwang; Boyce, Andrew K.J.; Artamonov, Mykhaylo V.; Askew-Page, Henry R.; Keller, T. C.Stevenson; Johnstone, Scott R.; Weaver, Rachel B.; Good, Miranda E.; Murphy, Sara A.; Best, Angela K.; Mintz, Ellen L.; Penuela, Silvia; Greenwood, Iain A.; Machado, Roberto; Somlyo, Avril V.; Swayne, Leigh Anne; Minshall, Richard D.; Isakson, Brant E.

In: Arteriosclerosis, Thrombosis, and Vascular Biology, Vol. 38, No. 9, 01.09.2018, p. 2065-2078.

Research output: Contribution to journalArticle

DeLalio, LJ, Keller, AS, Chen, J, Boyce, AKJ, Artamonov, MV, Askew-Page, HR, Keller, TCS, Johnstone, SR, Weaver, RB, Good, ME, Murphy, SA, Best, AK, Mintz, EL, Penuela, S, Greenwood, IA, Machado, R, Somlyo, AV, Swayne, LA, Minshall, RD & Isakson, BE 2018, 'Interaction Between Pannexin 1 and Caveolin-1 in Smooth Muscle Can Regulate Blood Pressure', Arteriosclerosis, Thrombosis, and Vascular Biology, vol. 38, no. 9, pp. 2065-2078. https://doi.org/10.1161/ATVBAHA.118.311290
DeLalio, Leon J. ; Keller, Alexander S. ; Chen, Jiwang ; Boyce, Andrew K.J. ; Artamonov, Mykhaylo V. ; Askew-Page, Henry R. ; Keller, T. C.Stevenson ; Johnstone, Scott R. ; Weaver, Rachel B. ; Good, Miranda E. ; Murphy, Sara A. ; Best, Angela K. ; Mintz, Ellen L. ; Penuela, Silvia ; Greenwood, Iain A. ; Machado, Roberto ; Somlyo, Avril V. ; Swayne, Leigh Anne ; Minshall, Richard D. ; Isakson, Brant E. / Interaction Between Pannexin 1 and Caveolin-1 in Smooth Muscle Can Regulate Blood Pressure. In: Arteriosclerosis, Thrombosis, and Vascular Biology. 2018 ; Vol. 38, No. 9. pp. 2065-2078.
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AU - DeLalio, Leon J.

AU - Keller, Alexander S.

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AU - Boyce, Andrew K.J.

AU - Artamonov, Mykhaylo V.

AU - Askew-Page, Henry R.

AU - Keller, T. C.Stevenson

AU - Johnstone, Scott R.

AU - Weaver, Rachel B.

AU - Good, Miranda E.

AU - Murphy, Sara A.

AU - Best, Angela K.

AU - Mintz, Ellen L.

AU - Penuela, Silvia

AU - Greenwood, Iain A.

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